Method of making paper containers



1 1 192 y 7 J. E; ANNEN umnon OF MAKING PAPER cnmmms Filed sept. 21.1923- 5 Sheets-Sheet 1 INVENTOF 1,636,584 y 2 J. E. ANNEN METHOD OFMAKING PAPER CONTAINERS Filed Sept. 21. 1923 5 Sheets-Sheet 2 1,636,584y J. E. ANNEN METHOD OF MAKING PAPER CONTAINERS Filed Sept. 21. 1923 5Sheets-Sheet 5 mvENToh July 19, 1927.

, 1,636,584 J. E. ANNEN 1 METHOD OF MAKING PAPER CONTAINERS I FiledSept. 21, 1923 5 Sheets-Sheet 4 mvsu-ron July 19 1927. ANNEN METHOD OFMAKING PAPER CONTAINERS Filed Sept. 21. 1923 5 Sheets-Sheet 5 portion ofa container;

Patented July 19, 1927.

UNITED STATES PATENT OFFICE.

JAMES E. ANNEN, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO THE" NATIONAL PAPERCAN COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

7 METHOD OF MAKING PAPER CONTAINERS.

Application filed September 21, 1923. Serial No. 664,022,

1 provide for rolling over an edge of the container and then forming therolled portion into a closure seat as, for example, by pressing ormashing down the rolled portion.

My method 1s applicable to the forming of a closure seat on containerseither before or after a bottom has been fixed therein. It is necessaryto grip the container immediately below the portion which is to beworked on in the formation of a closure seat and I provide for grippingthe container through the opening which is to form the container mouth.

In the accompanying drawings illustrating various forms ofcontainerclosures which may be made according to my method and mypresent preferred apparatus for carrying out the method:

Figure 1 is atop plan view, partly broken away, of a container'having aclosure formed according to my invention; "2;;

. Figure 2 is a section on the line 11-11 of Figure 1;

Figures 3, 4, 5, 6 and 7 are sectional views, partly broken away,through other forms of containers made according to my invention;

Figure '8 is a vertical section through a forming head showing the upperportion of a container body placed therein and'ready to be gripped bythe head;

Figure 9 is a view similar to Figure 8, but showing the outer clampingjaws in clamping position;

Figure 10 is a view similar to Figure -8, but showing the supporting andoperating mechanism and-showing the container after it has been grippedand its upper edge rolled over;

Figure 11 is a'view similar to Figure 8, but showing a second head withmeans for pressing .down the previously rolled over Figures 12 and 13are bottomviews of the inner clamping jaws showing the jaws in expandedand retracted positions; Figure 14 is a perspective view of clamping jawoperating cam block;

Figures 15 and 16 are top and side views respectively of the outerclamping jaws;

Figure piece which supports the clamping jaws;

Figure 18 is aperspective view of the frame spacer.

form an inturned seat the - below the lip 3.

17 is a top plan view of the frame" Figures 19 and 20 are front and sideelevations of one of the inner clamping jaws;

Figures 21 and 22 are side and top views of another'inner clamping jaw;

Figure 23 is a sectional view,pa rtly broken away, showing one of thedetents' and operating pins for the curling ring; and

Figure 24.- is a sectional view modified form of my apparatus.

Referring to the drawings, Figures 1 and 2 illustrate one of the simplerforms of container which may be made by my invention. The container body1 is made of paper or the like and is bent over at the top to form thelip portion 2 of the can orcontainer. The paper is then folded inwardlyto form a flange or seat 3 for receiving a closuredisc 4, which is alsoof paper and which is frictionally retained in place.

The can body is illustrated as being circular, but my method may bereadily applied to other shapes. The raw edge 5 of the paper is foldedinwardly to form a multiply closure seat 3 and to leave a smooth inneredge on the seat. The lip 2 and the seat 3 areformed by first rollingthe raw edge 5 over andthen pressing the rolle portion into the formshown.

If desired, the raw edge 5 may be turned upwardly into the lip 2, asshown in Figure 3, by initially rolling the raw edge further than wasdone with the container of Figure 2. The raw edge may also be concealedin the seat 3, as shown in Figure 4, or it may be simply turned back, asshown in Figures 2' and 5. Figure 5 shows a container having a hollowlip which is turned inwardly. to provide an inturned seat for moresecurely retaining the closure 4. In Figure 6, the raw edge has beenmoved up into the lip 2 and completely turned over to similar to Figure5. Figure 7 is similar in many respects to Figure 6, but shows the rawedge 5 turned even further.

Figures 4 to 7 show a head 6 immediately This bead is incidental tomanufacture and is-used to insure a tight grip during the rolling andpressing operations. It may be omitted if desired, as shown in Figures 2and 3. It is useful, however, in giving a showing a.

secure grip and it also. strengthens the container. In all of the conbeturned up into the lip.

The following description applies to the manufacture of the containersshown in Figures 1 to 7, all of which are circular in cross Section. Itwill be understood, however,

that the apparatus may be readily adapted to other shapes, as desired.

In the manufacture of a container according to my method, the can bodyl,'in cylindrical form with an upstanding raw edge 5, is inserted apredetermined distance into the operating head. As above pointed out,the style of container may be varied by varying the amount of roll; andthe distance which the can body is inserted in the head, of course, isimportant in this respect. The head comprises three outer clamping jaws7 havin grooves 8 therein. WVhen the outer jaws 7 are in closedposition, they form a complete circle and lightly grip the can 1, asshown in Figure 9.

It will be apparent that the inner jaws must have considerable movementin order to clear the seat 3 after it has been formed and I, therefore,provide six inner jaws, as best shown in Figures 12 and 13. The innerclamps comprise three jaws 9, each in the form of a segment of a circleand each having a rib 10 thereon. These jaws are spaced apart when inexpanded position, and the spaces are filled by movable jaws 11, whichare also provided with a head 10. When the inner jaws are expanded, theyform a complete circle with the bead 10 fitting into the groove 8. Thisforms the bead 6 in the can body and securely holds it in place with theraw edge and a portion of the container wall projecting above thegripped portion.

The outer clamping jaws 7 move radially in a bottom frame 12 which issecured to the machine frame 13, as best shown in Figure 10. Each of theouter jaws 7 is provided with a hardened face 14 and rollers 15. Thejaws areoperated by translation -cams 16 formed on three arms of a camblock v17. The cam block 17 is bolted to a head 18 by pins 19 which areslidablc vertically in the frame 13. The head 18 carries a pair ofrollers 20 which work in a positive cam 21 driven by a power shaft 22.As the shaft 22 is rotated, the cam block 17 is moved up and down andoperates the clamping'jaws in or out on each movement. The initialposition is, as shown in Figure 8,

with the cam block 17 in top position. As

it moves downwardly, the fronts of the traiislation cams16 bear on thehardened faces 14 and move jaws 7 inwardly to the position of Figure 9.Any further downward motion has no effect on the outer clamping jaws. Onthe up stroke, the backs of the cams 16 contact withthe rollers 15 andretract the outer jaws.

The-head 18 carries a pin 23 for expanding the inner clamping jaws. Thispin has tapered faces 24 which bear, on corresponding faces 25 on theinner jaws 11. As the the gripping of the can occupies only a small partof the downward stroke. As the downward stroke continues, the head 18comes in contact wit-h vertically movable pins 30 and forces themdownwardly. The pins 30 carry a ring 31 having a channeled lower edge32. As the head moves downwardly, the channel 32 comes in contact withthe raw edge 5 of the container androllsit inwardly, as shown in Figure10. The amount of rolling is, of course, dependent on the distance towhich the can body was inserted in the head prior to gripping and on thelateral clearance between the inner and outer jaws. I

' On the up stroke of the head, the pin 23 is retracted, freeing theinner jaws, and

translation cams 33 act on corresponding surfaces 34 at the outer endsof the T- shaped portions 26 of the jaws 9'and 11. The translation cams33' are six in number and are carried on the arms of the cam body 17.The movement of the inner jaws is large as they must clear the inwardlyrolled portion, 2 of the cam body 1. After the .inner jaws have beencollapsed, the back portions of the cams 16 contact with the rollers 15and retract the outer clamping jaws, completely releasing the can fromthe lead. i

The cam body 17 is provided with three radial slots 35 having innerflanges 36 at the bottoms thereof. As the cam body 17 is moved upwardly,the flanges 36 come in contact with the heads 37 on the'pins' 30 andretract the curling ring 31. At the top of the stroke, ball detents 38in the member 28 press into grooves 39 on the pins 30 and hold thecurling ring in the position of Fig-1 ure 8 to permit the insertion of anew can body. The radial slots 35 are provided to allow the use ofdifferent sizes of curling rings in the production of different sizes ofI cans.

carried out even though a assess-1.-

At the end of this operation the upper portion of the can takes the formshown in Figure 10 although the extent of rolls may be varied accordingto the style of can which is to be produced. The rolled container isthen inserted into a second head which 1s identical with the apparatusjust described with the exception of the curling rin 31. The curlingring 31 is replaced with a s aping ring 40 whose lower portion has acontour depending on the style of container which is to be produced. Therolled can is inserted the proper distance and the clamping jaws engagethe bead 6 and enclose the rolled portion of the container. The formingring 40 then moves downwardly and presses the rolled portion into shape,as shown in Figure 11. The jaws are then retracted and the container isremoved.

It will be seen that in the above forms, thecontainer is v grippedthrough the opening about which the closure seat is formed and the aboveoperations ma therefore, be

ottom has already been inserted in the container. In Figure 24, I haveshown a modified form of apparatus which is applicable for formingclosure seats before a bottom has been placed in the container. In thisformfof apparatus, the can body 2 is slipped over an arbor 41 carried ona support 42. The can body l'is surrounded by downwardly movable jaws43. The head .44 moves downwardly to roll the can body or to press therolled portion into form. Fi 'ure 24 shows the second operation. .As thehead 44 moves downwardly, a ring 45 engages the upper portion of thejaws 43 and presses them tightly against the can body 2. The ring 45 iscarried on slidable pins 46 and is normally pressed downwardlyby-compression springs 47. The head 44 also carries a forming ring 48similar to the forming ring 40.

I provide for making a container having a closure seat by rolling overan edge of the container and then forming the rolled portion into a'closure seat. I further pro vide for gripping the container through theopening about which the closure seat is to be formed.

While I have described the preferred embodiment of my invention, it willbe understood that it is not limited to the form shown, but maybeaccomplished by other apparatus. It will be understood further that thesequence of certain of the steps, as, for example, the formingof thebead for gripping'and the gripping proper, may be interchanged andvarious other chan esmay,

be made 'within the scope of the- 0 lowing claims.

I claim:

'1. The method of forming a closure retainin comprises rolling the edgeof the container over to form aloose rolland then pressing ontheupwardly and inwardly extending seaton a paper container, which portionof the roll to reverse the curvature of such portion and form it into anu standing portion and an inwardly projecting portion adapted to receivea closure.

2. The method of forming a closure retaining seat on a paper container,comprising rolling the edge of the container over to form aroll'substantially entirely around inwardly and upwardly projectingportion of the roll in a downward and outward direction to move suchportions of the .roll

. toward the bottom and outside portions of the mouth of the containerand pressing the flange of double thickness and an inwardly projecting.1 flange adapted to receive a, closure.

4. The method of forming a closure retaimng seat on a paper containerhaving a mouth or opening bounded b an upstanding wall, which comprisesrol ing the edge of said upstanding wall inwardly to form a roll, thewall portion onl of the container of t container being left open, andthen. deformin and compacting the roll to form an inwar 1y extendingclosure seat.

5. The method of forming a closure retainin seat on ajpape'r container,which comprises rolling the edge of the container inwardly to form aloose roll and then applying pressure to said loose roll in order toreverse the curvature of the inner and upper portion of the roll' andthus cause such portion to move into en a ement with other portions ofthe roll and orm an upstanding flange of doublethickness and an inwardlypro ecting flange spacebelow-the edge of the container and ,adaptedtoreceive a closure.

In testimony whereof I-have hereunto set my hand. JAMES ANNEN.

being formed into .the rol and the mouth 1e

